Patent US4792532A successfully refreshed from Google Patents.
Patent DE321016C successfully refreshed from Google Patents.
Patent US2618331A successfully refreshed from Google Patents.
US2618331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator blind construction
Assignee: EL REY VENETIAN BLIND Co
•
Filing: 1952-02-28
•
Granted: 1952-11-18
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 James M Hicks
- 👤 Zolezzi Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:41
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2210516A
Cited
US2580268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |